Umbrella having reflective markings



FIG. 1 is a perspective view of an umbrella having reflective markings, illustrated as stippling, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a plan view thereof; and,

FIG. 4 is an enlarged front elevation view of the umbrella having reflective markings, taken from FIG. 2.

The broken lines of the Figures depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an umbrella having reflective markings, as shown and described. 